266255871 has 32 divisors (see below), whose sum is σ = 419950080. Its totient is φ = 146893824.

The previous prime is 266255863. The next prime is 266255879. The reversal of 266255871 is 178552662.

It is an interprime number because it is at equal distance from previous prime (266255863) and next prime (266255879).

It is not a de Polignac number, because 266255871 - 2³ = 266255863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266255879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78711 + ... + 82023.

It is an arithmetic number, because the mean of its divisors is an integer number (13123440).

Almost surely, 2^266255871 is an apocalyptic number.

266255871 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

266255871 is a deficient number, since it is larger than the sum of its proper divisors (153694209).

266255871 is a wasteful number, since it uses less digits than its factorization.

266255871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455.

The product of its digits is 201600, while the sum is 42.

The square root of 266255871 is about 16317.3487736213. The cubic root of 266255871 is about 643.3289041608.

The spelling of 266255871 in words is "two hundred sixty-six million, two hundred fifty-five thousand, eight hundred seventy-one".